i haft to pitch in my .02 cents here and end my silent watching of the net, scott is definitly right, ( i am a certified bike mechanic and have rode triumph cycles for years) you should anneal the head gasket anytime you break the tourque on a copper head gasket ( definitly on a high compression or tuboed engine) ok back my little silent corner.....
>From: Scott William <scot...@yahoo.com> >Reply-To: KRnet <kr...@mylist.net> >To: KRnet <kr...@mylist.net> >Subject: Re: KR> Tweety is sick >Date: Fri, 9 Sep 2005 12:08:02 -0700 (PDT) > >In my opinion, anytime you lessen a torque value on >any metal gasket that holds back large quantities of >pressure, you must reseal the surface with material >that has correct sealing properties. The nice thing >about air coolded engines is that you are only trying >to keep pressure in and you don't have any fluid to >worry about, so there is no need to use sealers. That >being said, if you un-torque your head bolts, you >must, in my opinion, replace the head gasket. If you >are using copper, you can return the material to it's >original soft composition by annealing it. This can >easily be done, but ***is different than steal***. >With steal, you heat then quench to harden it. With >copper, just the opposite is true. You heat the copper >with a torch to at least 800deg F, then water quench >it. It will soften to it's original state. You can >then reinstall it. A concern of this method is >oxidation, but it is a long term concern. Rule of >thumb: Heat until cherry red, throw in a tub of >water, remove, dry, and let cool all the way. Then >use... > >As for the steal base gasket, remember, on the >corvair, that base gasket doesn't hold back combustion >pressure, only minimal crankcase pressure and oil. If >you didn't disturb the position of the cylinder, you >probably don't have to replace the base gasket. If you >did disturb the cylinder, don't anneal the gasket, >just put some sealer on it and you should be fine. > >Replace or anneal the headgasket if you untorqued the >bolts. Not only will you save your head from the >damage caused by leaking combustion gasses, but you'll >also save your life. > >Again, just my $.02. > >Better yet....I think I'll buy a horse. :-) > > >Scott > >--- Joseph H Horton <joe.kr2s.buil...@juno.com> wrote: > > > Scott, > > In your opinion would I have my engine at risk of > > the same thing > > happening? I just tore down last week and replaced > > the crank shaft in a > > corvair. I did not replace the copper head gaskets > > or the steel base > > gasket. It is not turbo but is the 3100 cc. I have > > run it for 10 min. but > > only up to 1800rpm. > > Thanks > > Joe Horton, Coopersburg, Pa. > > joe.kr2s.buil...@juno.com > > > > On Fri, 9 Sep 2005 05:08:41 -0700 (PDT) Scott > > William <scot...@yahoo.com> > > writes: > > > If I may offer this: The reason I asked about > > your > > > head gasket is because you did as I suspected. > > Just my > > > $.02 here on your work....but when you loosened > > the > > > nuts, you should have removed the head, > > re-annealed > > > the copper gasket, and reinstalled and torqued. > > Once > > > the torque is removed from copper, it will not > > > properly reseal (combustion pressures)unless it is > > > replaced with a new one, or annealed to soften it > > back > > > up. In a turbo motor such as yours, this is > > imperative > > > because of the increased combustion temps. > > > > > > Again, just my $.02 from years of building air > > cooled > > > stuff... > > > > > > If you want to know of a good annealing process, > > I'd > > > be gld to offer. > > > > > > Scott > > > > > > --- Orma <o...@aviation-mechanics.com> wrote: > > > > > > > Yes, burned under the copper gasket and > > eventually > > > > through the copper > > > > gasket. I'm going to talk to my VW guy today > > and > > > > have him look at the > > > > head.. The color of the deposits in the head, > > look > > > > to be on the lean side. > > > > The gas escaped at the top. Which is where I > > had > > > > removed the nuts to > > > > install the cht senders. There was torque on > > the > > > > nut, when I went to remove > > > > them, it's just that the gas escape pattern > > suggests > > > > that there was > > > > looseness at the top. With the turbo putting > > more > > > > pressure on the engine, > > > > the problem may be other. When I get back to > > the > > > > plane today, I'm going to > > > > play with the other head and see what the torque > > is > > > > like on that side. > > > > > > > > Orma > > > > Southfield, MI > > > > KR-2 N110LR 1984 > > > > See Tweety at > > http://www.kr-2.aviation-mechanics.com > > > > See other KR spces at > > > > www.kr-2.aviation-mechanics.com/krinfo.htm > > > > > > > > > > > > > > > > _______________________________________ > > > > Search the KRnet Archives at > > > > http://www.maddyhome.com/krsrch/index.jsp > > > > to UNsubscribe from KRnet, send a message to > > > > krnet-le...@mylist.net > > > > please see other KRnet info at > > > > http://www.krnet.org/info.html > > > > > > > > > > > > > > > > > > > > > > > > >______________________________________________________ > > > Click here to donate to the Hurricane Katrina > > relief effort. > > > http://store.yahoo.com/redcross-donate3/ > > > > > > _______________________________________ > > > Search the KRnet Archives at > > > http://www.maddyhome.com/krsrch/index.jsp > > > to UNsubscribe from KRnet, send a message to > > krnet-le...@mylist.net > > > please see other KRnet info at > > http://www.krnet.org/info.html > > > > > > > > > > _______________________________________ > > Search the KRnet Archives at > > http://www.maddyhome.com/krsrch/index.jsp > > to UNsubscribe from KRnet, send a message to > > krnet-le...@mylist.net > > please see other KRnet info at > > http://www.krnet.org/info.html > > > > >__________________________________________________ >Do You Yahoo!? >Tired of spam? Yahoo! Mail has the best spam protection around >http://mail.yahoo.com > >_______________________________________ >Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp >to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net >please see other KRnet info at http://www.krnet.org/info.html _________________________________________________________________ Express yourself instantly with MSN Messenger! Download today - it's FREE! http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/
